With Kotov and Yurchikhin is spaceflight participant ("space tourist") Charles Simonyi, a former Microsoft executive flying under contract with the Russian Federal Space Agency and Space Adventures, Ltd. He will return to Earth with Expedition 14 commander Michael Lopez-Alegria and flight engineer Mikhail Tyurin on April 20. Expedition 14 launched to the station on Sept. 18, 2006.

Soyuz TMA-10 is scheduled to dock at the ISS just after 2 p.m. CDT on Monday.

Their Soyuz spacecraft docked with the Earth-facing port on the ISS's Zarya module.

Yurchikhin and Kotov, who is the 100th Russian in space, will stay on the ISS with Sunita Williams, who arrived there in December. Simonyi will return to Earth on April 20 with Expedition 14 commander Michael Lopez-Alegria and flight engineer Mikhail Tyurin on-board Soyuz TMA-9.